70 O. N. Stoddard on the Brandon Tornado. 
the resistance on spheres to vary as the squares of their diameters. 
I have also added the resistance to a velocity of 30 feet per sec~ 
ond, computed upon the assumption that the resistance varies as 
the square of the velocity — 
In the following Table, column first shows the velocity in feet 
per second; column second shows the resistance to a sphere 5 
inches in diameter, moving with velocities expressed in the first 
column, deduced from Hutton’s experiments with the whirling 
machine; column third exhibits the same numbers corrected s0 
as to conform to the results of Newton’s experiments. is 
| 











EET TT Tas es =. 5 2. 3 a, ¢ 
o 3. 3 oO — ba : 2 m a i=} - 
° | | of = 1 = = i 
* | S28! ees | - | $28} eee 1.2] 223| eee ll -2| 222 | ee 
#5/ 822 (S88 | S5| 551/888 |\S3| 88) S88 ies | ene i sse 
Ge}; een ess Se] nen |e S's of Sea ese e2/)/ gn | ees 
2/382 | sb |\5| 222 | sbi ise| see) stelle | eee | eee 
seigekt S22 ise] ses | Sas Fs | eet |Se8 > 8] ees aes] 
feet. ounces. ounces. || feet. | ounces. | ounces, || feet. | ounces. | ounces. || feet. | ounces. ounces.) 
8 | 017 | -014 8 | 100 | ‘080 || 13 | -268 | -214 2 | ait 
4 9 | -023 127 2 9 || 19 4 | 467 | 
5 | *042 034 10: f° *toT 126 15 | *857 | -286 20 | 650 | °520 ] 
6 | -058 047 41 7}: 192 153 16 | 408 | *326 30 }1487 |1211 
TOT 062 12.| 228 182 17 | -463 | -370 












poaam ema Ts 
The resistances deduced from Newton’s experiments at veloci- 
ties of 15 and 30 feet per second are about one-fifth less than 
those obtained by Hutton. Diminishing the numbers in column 
second by one fifth part we obtain the numbers in column third 
which are presumed to represent the resistance in conformity with 
Newton’s experiments. a3 
If now we assume the specific gravity of ice to be 0-869 as 
given in the French Annuaire, the weight of spheres of ice 2, 
1 and 4 inches in diameter will be as follows; and the greatest 
velocities which they can acquire by falling through the atmo- 
sphere are shown in the following ‘Table. 
~— Weight ~ Terminal 
ef sphere. | velocity. | 
2:0908 ounces. 98 feet. 
02614 * 70 




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49 ce 
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cess 


UOs24. 


een 

Arr. X1L—The Brandon Tornado of January 20th, 1854; by 
O 
N. Sropparp, Prof. Chem. and Nat. Phil., Miami Univer : 
sity, Ohio. 
Tue whole breadth of the State of Ohio from Southwest t? 
Northeast, was swept on the 20th of January, 1854, by a storm 
of unusual violence. Ss 
Traces of the same storm have been obtained from a point QT 
miles N. E. of Little Rock, Arkansas, also from the western patt 
of Pennsylvania. The whole length cannot be less than 800 
